OBD-II FAULT CODE
B2178
Window Driver Rear Remote Down Switch Short to Battery
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B2178.
- Body/accessory warning lamp or feature not working
- Faulty switch/actuator
- Broken wiring in door hinge area
- Blown fuse
- Module coding/calibration issue
- Wire shorted to power feed
- Check related fuses, connectors, grounds and switch/module power supply
- Check switch input, actuator output, fuse and door-jamb wiring
- Check for unwanted voltage on signal/control circuit
- Repair broken wiring, replace failed switch/actuator, recalibrate if required
- Repair harness short to power or replace internally shorted component
Related Codes
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.